GMC Terrain: Battery Saver Active → Diagnosis

Many modern GM made vehicles have a battery saver feature, this includes the GMC Terrain.  If you are getting a “battery saver active” message, it means that your Terrain’s electrical system voltage has dropped to a critical level (less than 11.7 volts).  Typical electrical systems run at 13+ volts with the engine running.  The battery … Read more

GMC Terrain:  Bad ECM → Symptoms + Diagnosis

Your GMC Terrain’s ECM (Engine Control Module) is its brain.  Just like a human’s brain, your Terrain can’t function without it. It is sometimes referred to as the ECU or PCM.  It’s all the same thing. The ECM controls and directs your entire drivetrain (unless there is a serrate transmission controller). When an ECM starts … Read more

GMC Terrain P0353 Diagnosis

P0353 is a generic OBD2 code that indicates that ignition coil “C” has an issue with the primary or secondary wiring circuits.  It has the same meaning for the GMC Terrain as it would any other vehicle.  It is typically caused by a bad coil pack or wiring harness issue, although there can be caused … Read more